RCA-Victor-Co-Inc-98T2 电路原理图.pdf

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1、I IMBKATts Dr CWOftli OliMONWIRING L37 ollIU INSULATED FROM I aJT SiT Sjif SF CHASSIS _I 7 Z ? Steps Connect the high Tune test- Turn radio- side of test-osc. to osc. to dial to 6K7 1-F grid cap, in aeries with .01 mfd. 6K8. det. grid cap, in aeries with .01 nd. Antenna Terminal, in series with 200

2、mmi. Repeat steps 3 and 4. Antenna Terminal, in series with 400 ohms. 455 kc *A” band, Quiet Point between 465 kc 550-750 kc 600 kc (160.5) “A” band 1,600 kc (28) A” band 6 mic (26.6) B band 20 me (22) “C” band peak output L12 and L13 (2nd I-F Transformer) LIO and Lll (let I-F Tranatormer) C25 (osc.

3、) C30 (ant.) C23 (osc.)* -rUmNs” 3IS77 *- .- . . -1 Adjustments for Electric Tuning These models have eight push buttons. The left-hand button is a Victrola switch. The right-hand button connects the gang con denser for manual tuning. The other six buttons are for electric tuning of six different st

4、ations in the standard-broadcast range. The station buttons connect to separate magnetite-core oscillator coils and separate antrana trimmers which mu.st be adjusted for the desired stations. Use an insulated screwdriver or alignment tool such as RCA Stock No. 31031. Allow at least five minutes warm

5、-up period before making adjustments. _ The procedure is as follows; 1. Make a list of the desired six stations, arranged in order from low to high frequencies. 2. Push in the dial-tuning button, and manually tune in the first _ station on the list. 3. Push in station button No. 1 (second from left)

6、 and adjust No. 1 oscillator core (L37) to receive this station. Screw the core all the way in, to lowest frequency, and then unscrew slowly _ until station is received. 4. Adjust No. 1 antenna trimmer (C36) for maximum output on this station. Clockwise adjustment of cores and trimmers tunes the cir

7、cuits to lower frequencies. 5. Adjust for each of the remaining five stations in the same _ manner. 6. Make a final careful adjustment of the oscillator cores and antenna trimmers. C21 (osc.)* til sec. Aoj. A55 KC FcdJow Adjustments for Electric Tuning.” *Use minimum capacity peak if two peaks can b

8、e obtained, and rock gang condenser slightly while adjusting C23 and C21. Note.Oscillator tracks 455 kc above signal on all bands. Dial-Indicator Adjustment.After fastening the chassis in the cabinet, move the dial indicator on the drive cable to the left-hand end mark on dial, with gang condenser fully meshed. L13 TUNING TUE 134 COMPILED BY M, h- c?9 Pirl-FTRANiJ_I IJly g 1 TTcael 1 BALLAST jRECT. eo-naOKC -VfO OUTPT XJ fl-J - A G SOOKC VICTROLA TERmiNALS N. BEITMAN, SUPREME PUBLICATIONS 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN